Opera is unusable

I used to use Opera as my only browser and even recommended it to others, but I can no longer continue to do so. It is sluggish and crashes constantly with no option to restore my previous browsing session. Sometimes, it will close only my private browsing window with no warning. This is unacceptable and renders the browser unusable to me. I was initially attracted to Opera because it was not like any other browser, but that is no longer the case. Stop copying the flaws of other browsers and make one that works. Opera gets worse with every update. It is almost as bad as Firefox which I ditched for Opera. I am off in search of another browser.